Brake



June 5, 1934.

D. L. GALLUP BRAKE Filed Jan. 2. 1930 Wil /Jana I INVENTOR. GALLU P E4 Qfi fiw EzL/y DAVID L Patented June 5, 1934 BRAKE David L. Gallup, South Bend, Ind., assignor to Bendix Brake Company, South Bend, Ind., a

corporation of Illinois Application January 2, 1930, Serial No. 417,868

8 Claims.

This invention relates to brakes and is illustrated as embodied in a band type of internal exa pending automobile brake.

, -An object of the invention is to provide a very simple, compact adjusting mechanism for increasing the overall length of the band, thus compensating for the normal wear of the lining or other-frictional material secured thereto.

In one desirable arrangement there is provided a plate, preferably a stamping, at one end of a toggle operated band which stamping is adjustably secured to a vertically extending web memher in juxtaposition therewith.

An eccentric secured to the web member is arranged to abut a struck up portion in a stamping, rotation of the eccentric serving to impart relative lineal movement between the web and stamping to increase the overall length of the band and maintain a substantially unvariable degree of movement of the applying means for the band.

Other details of construction, including a novel combined clamp and guiding means for the parts, and combinations of parts, will become apparent from the following detailed description of a preferred embodiment of my invention disclosed in the figures of the drawing, in which:

Figure 1 is a side elevation of the brake mechanism disclosing my novel adjustment at one end thereof; and

Figure 2 is a transverse section through the adlusting mechanism taken on the line 2-2 of Figure 1.

The illustrated brake includes the usual rotatable drum 10 at the open side of which there may be arranged a suitable backing or support plate 12 and within which is arranged the retarding means of the brake which, in this particular embodiment, takes the form of an annular band 14 reinforced at its spaced apart ends by radially I periphery of the band is compensated for by increasing the overall length of the braking device by a novel adjusting mechanism at one end thereof. As particularly disclosed in the figures of the drawing, the adjustment comprises, in general, an adjusting plate 22, preferably a stamping, arranged in contiguous relation and in parallelism with the web member 16. j

The adjusting plate is preferably rectangularly slotted adjacent its ends to receive polygonal body portions of bolts 24 provided with nuts 25, which nuts serve to clamp washers 26 against the respective faces of the web and plate to frictionally hold the plate in its adjusted position. The plate 22 is preferably provided, intermediate the slots, with a third rectangular slot having at one end thereof a struck up portion 28, which portions is engaged by an adjusting disk member 30 eccentrically mounted and keyed to a stud 32 rotatable in the slotand secured as by a unit 33 to the web 16. The disk 30 is accordingly frictionally clamped to the side of the plate 22 and serves, together with 5 the bolts 24 and the washers 26, to frictionally and rigidly clamp the web 22 to the plate 16. The extreme end of the adjusting plate 22 is preferably ofiset into the plane of the web 16 at 34 and thence extends a short distance to be pivotally secured to one link of a toggle mechanism for actuation of the band.

In operation, actuation of the toggle links 36 by a crank operated tension link 37 serves to spread apart the ends of the band into drum engagement against the resistance of return springs 38 and 40, the band anchoring on one or the other of anchor posts 42 secured to the support plate 12, depending upon the direction of drum rotation. An eccentrically mounted adjustable 0 stop 44 serves, together with the anchors, to place the band member, under the action of the return springs upon release of the applying mechanism, in its inoperative position.

In order to efiect the desired increase in the over-all length of the band and plate to compensate for lining wear and without affecting the setting of the toggle actuating mechanism, it is but necessary to loosen the nuts on bolts 24 and then rotate the disk member 30 by means of the stud 32, which is headed on its end 33 for that purpose. The rotation of the eccentrically mounted disk serves to impart relative movement, through the struck up portion 28, to the adjusting plate and the web to thus effect the desired increase in length. The clamping bolts 24, together with the stud 32, are now tightened to constrain relative movement between the parts and preserve the adjustment. It is ,to be noted that the bolts 24 serve the double function of guiding, by means of the square headed portions thereon, the movement of the parts, as well as subsequently aiding in clamping the same together.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment or otherwise than by the terms of the appended claims.

I claim:

1. A brake structure comprising a rotatable drum, a lining covered band member within said drum adapted to be expanded into contact therewith, together with means for compensating for wear of said lining comprising a web member secured to said band, a slotted plate member in contact with and movable relative to said web member, studs secured to said Web and passing through the slots in said plate, an eccentric carried by the web and a member on the plate engaging the cocentric.

2. A brake structure comprising a rotatable drum,-a lining covered band member within said drum adapted to be expanded into contact therewith, together with means for compensating for wear of said lining comprising a web member secured to said band, a slotted plate member in contact with and movable relative to said .web member and means comprising studs secured to said web and passing through the slots in said plate, for securing said web and plate together, one of said studs provided with a part rigid therewith and operated by rotation thereof for effecting relative movement between said web and plate.

3. A brake structure comprising a rotatable d'rum, an annular lining covered band member within said drum adapted to be expanded into con-- tact therewith, together with means for compensating for wear of said lining comprising juxtaposed web and plate members, the former secured to the band and the latter movable relative to said web by an eccentrically mounted disk supported by said web and contacting a struck up portion of said plate.

4. A brake structure comprising a rotatable drum, an annular lining covered friction device within said drum adapted to be expandedinto contact therewith, together with means for compensating for lining wear of said device comprising juxtaposed web and plate members, the latter pivoted at its end to applying means for the friction device and further provided with alined slots receiving studs secured to said web, one of said studs provided with an eccentrically mounted element engaging a struck up portion of said web.

5. A brake structure comprising a rotatable drum, an annular lining covered friction device within said drum adapted to be expanded into engagement therewith, together with means for compensating for the lining wear of said friction device comprising a member movable on one end of said friction device and means for adjusting the member including an eccentric carried by the friction device and means for clamping said member immovably to the friction device in adjusted position.

6. A brake comprising a friction element, a thrust member mounted on one end thereof, means on the friction element including an eccentric for effecting relative movement between the element and the member, and fastening means for clamping the element and member fixedly together in adjusted position.

7. A brake comprising a friction element, a member mounted on one end thereof and movable lengthwise thereof to adjust the brake for wear, an eccentric on the element engaging the member, and bolts passing through said element and member for clamping said member immovable in adiusted position.

8. A brake shoe having a web, a plate, a corre-- sponding hole and slot in said web and plate, a stud passing therethrough to' frictionally bind the web and plate, and a part rigid with the stud and adjacent said slot and operated by turning said stud for effecting relative-movement between said web and plate.

DAVID L. GALLUP. 

